<script setup>
import { User, Lock } from '@element-plus/icons-vue'
import { ref } from 'vue'
import { ElMessage } from 'element-plus'
//控制注册与登录表单的显示， 默认显示注册
const isRegister = ref(false)

// 定义数据模型
const registerData = ref({
  username:'',
  password:'',
  rePassword:''
})

// "记住我"
const checked = ref(false)

// 校验密码的函数
const checkRePassword = (rule, value, callback) => {
  if (value==='') {
    callback(new Error('请再次确认密码'))
  } else if (value !== registerData.value.password) {
    callback(new Error('两次输入密码不一致'))
  } else {
    callback()
  }
}

// 定义表单校验规则
const rules = {
  username:[
    { required: true, message: '请输入用户名', trigger: 'blur' },
    { min: 3, max: 16, message: '长度在3~16个字符', trigger: 'blur' }
  ],
  password:[
    { required: true, message: '请输入密码', trigger: 'blur' },
    { min: 3, max: 16, message: '长度在3~16个字符', trigger: 'blur' }
  ],
  rePassword:[
    {validator: checkRePassword, trigger: 'blur'}
  ]
}

// 调用后端注册接口
import { userRegisterService } from '@/api/user.js'
const register = async() => {
  if (registerData.value.password !== registerData.value.rePassword) {
    ElMessage.error('两次密码不一致')
  } else {
    let result = await userRegisterService(registerData.value)
    ElMessage.success(result.message ? result.message : '注册成功')
  }
}

// 登录复用注册的表单数据模型
// 表单校验规则
// 调用后端登录接口
import { userLoginService } from '@/api/user.js'
// 使用路由
import { useRouter } from 'vue-router'
// 引入token的store
import { useTokenStore } from '@/stores/token.js'
import { useRememberInfoStore } from "@/stores/rememberInfo.js";
const rememberInfoStore = useRememberInfoStore()
const tokenStore = useTokenStore()
const router = useRouter()
const login = async () => {
  let result = await userLoginService(registerData.value)
  ElMessage.success(result.data.message ? result.data.message : '登录成功')
  // 把token存储到pinia中
  tokenStore.setToken(result.data)
  rememberInfoStore.setRememberInfo({
    checked: checked.value,
    username: registerData.value.username,
    password: registerData.value.password
  })
  // 登录成功后，跳转到首页
  router.push('/home')
}

// 初始化登录表单
const initRegisterData = () => {
  if (rememberInfoStore.rememberInfo.checked) {
    registerData.value = {
      username: rememberInfoStore.rememberInfo.username,
      password: rememberInfoStore.rememberInfo.password,
      rePassword:''
    }
    checked.value = rememberInfoStore.rememberInfo.checked
  }
}

// 清空注册表单数据
const clearRegisterData = () => {
  registerData.value = {
    username:'',
    password:'',
    rePassword:''
  }
}

import {onMounted} from "vue";

onMounted(() => {
  initRegisterData()
})

import {watch} from "vue";
watch(checked, newVal => {
  // 是否记住密码
  if (newVal) {
    rememberInfoStore.setRememberInfo({
      checked: newVal,
      username: registerData.value.username,
      password: registerData.value.password
    })
  } else {
    rememberInfoStore.setRememberInfo({
      checked: newVal,
      username: '',
      password: ''
    })
  }
})

</script>

<template>
  <el-row class="login-page">
    <el-col :span="12" class="bg"></el-col>
    <el-col :span="6" :offset="3" class="form">
      <!-- 注册表单 -->
      <el-form ref="form" size="large" autocomplete="off" v-if="isRegister" :model="registerData" :rules="rules">
        <el-form-item>
          <h1>注册</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input :prefix-icon="Lock" type="password" placeholder="请输入密码" v-model="registerData.password"></el-input>
        </el-form-item>
        <el-form-item prop="rePassword">
          <el-input :prefix-icon="Lock" type="password" placeholder="请输入再次密码" v-model="registerData.rePassword"></el-input>
        </el-form-item>
        <!-- 注册按钮 -->
        <el-form-item>
          <el-button class="button" type="primary" auto-insert-space @click="register">
            注册
          </el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = false;clearRegisterData();initRegisterData()">
            ← 返回
          </el-link>
        </el-form-item>
      </el-form>
      <!-- 登录表单 -->
      <el-form ref="form" size="large" autocomplete="off" v-else :model="registerData" :rules="rules">
        <el-form-item>
          <h1>登录</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input name="password" :prefix-icon="Lock" type="password" placeholder="请输入密码" v-model="registerData.password"></el-input>
        </el-form-item>
        <el-form-item class="flex">
          <div class="flex">
            <el-checkbox v-model="checked">记住我</el-checkbox>
          </div>
        </el-form-item>
        <!-- 登录按钮 -->
        <el-form-item>
          <el-button class="button" type="primary" auto-insert-space @click="login">登录</el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = true;clearRegisterData()">
            注册 →
          </el-link>
        </el-form-item>
      </el-form>
    </el-col>
  </el-row>
</template>

<style lang="scss" scoped>
/* 样式 */
.login-page {
  height: 100vh;
  background-color: #fff;

  .bg {
    background: url('@/assets/logo2.png') no-repeat 60% center / 450px auto,
    url('@/assets/login_bg.jpg') no-repeat center / cover;
    border-radius: 0 20px 20px 0;
  }

  .form {
    display: flex;
    flex-direction: column;
    justify-content: center;
    user-select: none;

    .title {
      margin: 0 auto;
    }

    .button {
      width: 100%;
    }

    .flex {
      width: 100%;
      display: flex;
      justify-content: space-between;
    }
  }
}
</style>